Extended time-to-collision measures for road traffic safety assessment

Extended time-to-collision measures for road traffic safety assessment

0.00 Avg rating0 Votes
Article ID: iaor20013152
Country: United Kingdom
Volume: 33
Issue: 1
Start Page Number: 89
End Page Number: 98
Publication Date: Jan 2001
Journal: Accident Analysis and Prevention
Authors: ,
Keywords: transportation: road, measurement
Abstract:

This article describes two new safety indicators based on the time-to-collision notion suitable for comparative road traffic safety analyses. Such safety indicators can be applied in the comparison of a do-nothing case with an adapted situation, e.g. the introduction of intelligent driver support systems. In contrast to the classical time-to-collision value, measured at a cross section, the improved safety indicators use vehicle trajectories collected over a specific time horizon for a certain roadway segment to calculate the overall safety indicator value. Vehicle-specific indicator values as well as safety-critical probabilities can easily be determined from the developed safety measures. Application of the derived safety indicators is demonstrated for the assessment of the potential safety impacts of driver support systems from which it appears that some Autonomous Intelligent Cruise Control (AICC) designs are more safety-critical than the reference case without these systems. It is suggested that the indicator threshold value to be applied in the safety assessment has to be adapted when advanced AICC-systems with safe characteristics are introduced.

Reviews

Required fields are marked *. Your email address will not be published.